Deps: Bump the dependencies group

Bumps the dependencies group in /backport-pull-request with 1 update: [pontos](https://github.com/greenbone/pontos).

- [Release notes](https://github.com/greenbone/pontos/releases)
- [Commits](greenbone/pontos@v23.10.4...v23.10.6)

---
updated-dependencies:
- dependency-name: pontos
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: dependencies
...

Signed-off-by: dependabot[bot] <support@github.com>